package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DeadlockLoserDataAccessException;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
@Slf4j
@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper  dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

//    @Scheduled(cron = "*/5 * * * * ?")
//    public void schedule(){
//        System.out.println("--------我是定时任务------");
//    }
    /**
     * 新增菜品
     * @param dishDTO
     * @return
     */

    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取生成的主键
        Long dishId = dish.getId();

        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor ->
                    dishFlavor.setDishId(dishId));

           dishFlavorMapper.insertBath(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 菜品批量删除
     * @return
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //先判断菜品是否能够删除----是否在售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断是否关联了套餐
        List<Long> setmealIds = setmealDishMapper.getStemealDishByDishId(ids);
        if (setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //删除菜品表中的数据
      /*  for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/
        //优化：批量删除
        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);

        //根据菜品id集合批量删除关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品数据和对应的口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据Id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据Id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //封装数据
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表
        dishMapper.update(dish);
        //删除口味表
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味表
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertBath(flavors);
        }
    }

    /**
     * 根据分类id查菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> findBycategoryId(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        List<Dish> dishList = dishMapper.findBycategoryId(dish);
        return dishList;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.findBycategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
